Abstract
Focusing on the Personal Handy-phone System (PHS) positioning service used in physical distribution logistics, a positioning method for improving positioning accuracy is invented. A disadvantage of PHS positioning is that measurement errors caused by the fluctuation of radio waves due to buildings around the terminal are large, ranging from several tens to several hundreds of meters. Therefore, in this study, a positioning method is developed, which learns radio intensity distribution of each cell station containing errors in advance, and matches them with new data according to the radio propagation map. Then the positioning accuracy is improved to about 1/2 that of the conventional positioning method.
